Arsenal manager Arsene Wenger hailed Nico Yennaris as a shining example for other young players.
Yennaris, a product of Arsenal's youth system, is part of the first-team squad for the Capital One Cup match against Coventry on Wednesday.
The 19-year-old, who was the club's mascot for a Premier League game at Highbury in September 2000, signed professional terms in July 2010 and made his senior debut against Bolton last October.
"He has a good chance to be on the pitch on Wednesday night, so that is a fantastic story," Wenger told Arsenal Player.
"Dreams do come true sometimes when you really want it and have been lucky as well.
"First of all you must really want it and Nico is one of these guys who has that. He is ready to give himself a chance with full commitment.
"Nico is a fantastic player, but also has an excellent attitude - his is a good example to follow for all of the fans who will turn up on Wednesday night."
As well as giving youngsters like Hector Bellerin, Kris Olsson, Serge Gnabry, Craig Eastmond and Ignasi Miquel the chance of some first-team action, Wenger will also give some of his fringe players the opportunity to impress.
Such is the current depth of Wenger's squad, which has made an unbeaten start to the new season following Sunday's 1-1 draw at Manchester City, Andrey Arshavin and Theo Walcott have struggled to make an impact, but should start on Wednesday.
Brazil international Andre Santos and Swiss defender Johan Djourou are also expected to come into the side, while French striker Olivier Giroud is looking for his first goal since his summer move from Montpellier and midfielder Emmanuel Frimpong may be in contention for the squad after recovering fitness from a serious knee injury.